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I have a few questions about developing mobile substrate tweaks.
First of all, how do you make them?
Do you have to use XCode?
What kind of files are needed and where do you place your code?
How do you hook into an app?
For example if I want to change something in the Messages app, how could I program it to hook into Messages.app?
I am pretty familiar with developing regular apps for the app store, and I am very interested in mobile substrate. I would really like to know how to do it and where to start. Thanks!